A man suffered a broken jaw when he was attacked in a Brighton night club.
The attack took place in The Tube nightclub in King’s Road Arches, Brighton, at about 3.50am on Sunday 5 May.
The victim, an Asian man in his early twenties, was standing near the dance floor when he was punched in the face. He needed surgery after the attack.
Sussex Police said that the suspect was a 5ft 8in tall white man, of average build, aged about 18 to 23 years old and with short dark brown or black hair.
He was wearing a t-shirt and a pair of sunglasses.
Anyone who saw the attack is asked to call Sussex Police on 101 or the independent charity Crimestoppers anonymously on 0800 555111.